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sci.CIE-Lab-color-difference-dE94 Calculator
Calculates the CIE ΔE*94 perceptual colour difference between two Lab* colours, which weights chroma and hue differences by chromaticity. ΔE*94 < 1 is imperceptible; 1–2 is perceptible under close observation — ΔE*94 is more perceptually uniform than ΔE*ab for saturated colours.
Inputs
L1
Reference formula or conversion factor shown for context.
A1
Reference formula or conversion factor shown for context.
B1
Reference formula or conversion factor shown for context.
L2
Reference formula or conversion factor shown for context.
A2
Reference formula or conversion factor shown for context.
B2
Reference formula or conversion factor shown for context.
Results
ΔE*94 colour difference
The arithmetic difference between the two values.
ΔL* (lightness)
Sample size or count used in the calculation.
ΔC* (chroma)
Reference formula or conversion factor shown for context.
ΔH* (hue)
Reference formula or conversion factor shown for context.
ΔE*94 = √[(ΔL/SL)²+(ΔC/SC)²+(ΔH/SH)²]
Reference formula or conversion factor shown for context.
perceptibility threshold
Reference formula or conversion factor shown for context.